Once Threshold Is Reached, the Rising Phase of the Action

question 112

Short Answer

Once threshold is reached, the rising phase of the action potential in pacemaker cells is brought about by the opening of ____-type ____ channels.

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Definitions:

Terpenes

A large and diverse class of organic compounds produced by a variety of plants, especially conifers, which are often strong smelling and used in natural roles as protection against herbivores, insects, and pathogens, as well as in perfumes, spices, and pharmaceuticals.

Sesquiterpene

A category of terpenes composed of three units of isoprene, bearing the molecular formula C15H24.

Steroid

A type of organic molecule characterized by a specific carbon structure with four fused rings, playing crucial roles in biological processes.

Steroid

A type of organic molecule with a characteristic arrangement of four cycloalkane rings joined together; important in cell membrane structure and signaling.